A man has died and a woman has suffered severe injuries after the truck they were in crashed into a shop in the state’s southeast.

The Country Fire Service (CFS) said the B-Double truck lost control and ploughed into the lawnmower service shop at Bordertown about 3am (CDT) on Thursday.

The CFS said the truck driver died at the scene while a woman in the vehicle’s cabin was pulled from the wreckage by emergency workers and taken to hospital.

An SA Ambulance spokeswoman told AAP the injured passenger had been flown to Adelaide with severe abdominal injuries and lacerations, and her condition was unknown.

The spokeswoman said a woman inside the shop at the time had also suffered internal injuries and was taken to hospital.

A man inside the shop when the crash occurred was not hurt, the spokeswoman said.

The CFS said it was unaware of anyone being inside the shop at the time of the incident.

A police media spokesman said he was waiting on details from the scene.